"I have run 2/0 cables from the windlass directly to the house bank, with a 110 amp breaker in the feed."
You might want to doublecheck that. If you were to have a crowbar short at the winch (i.e. drop a crowbar across the power cables) and full battery power were to run in the cables through a dead short, it might weld the breaker shut instead of tripping it. Most common 12V breakers will weld shut and fail at something like 3300 amps, which even a common "automobile" battery can put into a dead short on a heavy battery cable. The breakers designed for higher loads (for direct use in battery cables) are often over $100 each. If you're already using one of those "nevermind". Otherwise, you might want to use an ANL fuse in that line as well.